The W810 has benefited from several improvements. Most notably are quad band connectivity, EDGE support for faster wireless data transfers, a light level sensor, a slightly enhanced display, but slightly reduced battery life.
Other features include a full function internet browser, 2 Megapixel digital camera with auto-focus and flash, the HPM-70 stereo headset, Memory Stick PRO Duo slot, 20 MB of internal memory, and a music-only mode where phone functions are fully turned off, which also allows the phone to be used as a Walkman in areas mobile phones would usually be barred from, such as airplanes and hospitals, in addition to providing longer battery-life. The phone supports MP3, AMR, MIDI, IMY, EMY, WAV (16 kHZ maximum sample rate) and AAC audio formats and MPEG-4 and 3GPP video formats. However WMA audio format is not supported.